.box {
    width: 1000px;
    height: 700px;
    margin: 0 auto;
    background-color: darkgray;
    position: relative;
}

.box2 {
    width: 300px;
    height: 500px;
    background-color: black;
    position: absolute;
    top: -30px;
    right: 80px;
    margin-top: 20px;
    box-shadow: 20px 20px 10px #898989;
    text-align: center;
    color: whitesmoke;
}

.box3 {
    width: 300px;
    height: 200px;
    background-color: #eed0cb;
    position: absolute;
    bottom: 100px;
    left: 400px;
    padding-left: 50px;
    padding-top: 50px;
    box-shadow: 10px 10px 20px #898989;
    text-align: center;
    z-index: +1;
}

.container {
    width: 200px;
    height: 200px;
    position: relative;
    left: 300px;
    top: 150px;
    box-shadow: 10px 10px 50px #898989;
}